As Medway prepares to mark the 350th anniversary of the Dutch Raid an extremely rare map of the battle has come to light.

The defeat in June 1667 saw the British humiliated by the Dutch, but led to a huge investment in new ships and dockyard facilities, laying the foundations of British supremacy at sea for 200 years and contributing to economic success and the growth of the empire.

It is still regarded as one of the worst military defeats ever suffered by the British and now a rare map detailing the invasion will go on display in June, almost 350 years to the day since the battle. The British Museum holds the only other known copy.

The two-part map, which on the left-hand side shows London, the Thames Estuary, north Kent and south Essex coasts, will be put on display by West End book and map dealer Tim Bryars.

The right side details the invasion of Medway and the bombardment and occupation of the Isle of Sheppey.

The map was drawn by the Flemish engraver Gaspar Bouttats and is thought to have been printed in Vienna. It also carries the wrong date for the battle – August 24, 1666.

The words “the tussle by Dutch ships against those of the English in the Chatham reef” in Italian are written on it.

Mr Bryars said: “The Dutch bombarded Sheerness, occupied the Isle of Sheppey for several days, and burned anything which was not worth looting.

“The Dutch fleet sailed further up the River Thames to Gravesend, and up the Medway as far as Chatham, burning or capturing many of the Royal Navy’s most powerful vessels, including the flagship Royal Charles.

“I know of only one other example of this map, which is in the British Library.” It will be on display at the London Map Fair on the weekend of June 17-18.

More than 40 dealers from across the globe will display their collections. Visit www.londonmapfairs.com